STR910FAZ32H6T STMICROELECTRONICS [STMicroelectronics], STR910FAZ32H6T Datasheet - Page 28
STR910FAZ32H6T
Manufacturer Part Number
STR910FAZ32H6T
Description
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.STR910FAZ32H6T.pdf
(99 pages)
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Functional overview
3.15.1
3.15.2
3.15.3
28/99
Figure 3.
In-system-programming
The JTAG interface is used to program or erase all memory areas of the STR91xFA device.
The pin RESET_INn must be asserted during ISP to prevent the CPU from fetching invalid
instructions while the Flash memories are being programmed.
Note that the 32 bytes of OTP memory locations cannot be erased by any means once
programmed by JTAG ISP or the CPU.
Boundary scan
Standard JTAG boundary scan testing compliant with IEEE-1149.1 is available on the
majority of pins of the STR91xFA for circuit board test during manufacture of the end
product. STR91xFA pins that are not serviced by boundary scan are the following:
●
●
●
CPU debug
The ARM966E-S CPU core has standard ARM EmbeddedICE-RT logic, allowing the
STR91xFA to be debugged through the JTAG interface. This provides advanced debugging
features making it easier to develop application firmware, operating systems, and the
hardware itself. Debugging requires that an external host computer, running debug software,
is connected to the STR91xFA target system via hardware which converts the stream of
debug data and commands from the host system’s protocol (USB, Ethernet, etc.) to the
JTRSTn
JRTCK
JTDO
JTMS
JTCK
JTDI
JTAG pins JTCK, JTMS, JTDI, JTDO, JTRSTn, JRTCK
Oscillator input pins X1_CPU, X2_CPU, X1_RTC, X2_RTC
Tamper detect input pin TAMPER_IN (128-pin and 144-pin packages only)
JTAG chaining inside the STR91xFA
TDO
MAIN FLASH
TDI
JTAG TAP CONTROLLER #1
JTAG TAP CONTROLLER #3
TMS
TMS
BOUNDARY SCAN
TCK
TCK
SECONDARY FLASH
TRST
TRST
TDO
TDI
STR91xFAx32 STR91xFAx42 STR91xFAx44
register length
Instruction
BURST FLASH
MEMORY DIE
is 8 bits
TDI
JTAG
JTAG TAP CONTROLLER #2
TRST
CPU DEBUG
TCK
TMS
TDO
ARM966ES DIE
5 bits for TAP #1
4 bits for TAP #2
register length:
Instruction
JTAG
STR91xx
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